Device for removing casings from drilled wells.



N. BEAUMONT. DBVlGE PoR RBMOVING memes FROM DRILLBD WELLS.

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Patented Sept. 23, 1913.

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NELSON BEAUMONT, 0F RACINE, WISCONSIN.

DEVICE FOR REMOVING CASINGS FROM DRILLED WELLS.

Specification of Letters Patent.

Patented Sept. 23, 1913.

pplication led July 5, 1913. Serial No. 777,487.

To all whom t may concern Be it known that I, NELSON BEAUMONT, a citizen of the United States, residing at Racine, in the county of Racine and State of Wisconsin, have invented certain new and useful Improvements in Devices for Removing Casings from Drilled NVells; and I do hereby declare the following to be a full,

clear, and exact description of the invention,

such aswill enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements inl devices for recovering broken sections of tubing in wells and consists essentially in the provision of a spiral resilient member adapted to .be held in the circumferential groove of a tool and provided with a sharp edge which, when the spring expands, is adapted to bite into either the inner' surface of the pipe or about the circumference thereof and grip the pipe sufficiently so that the latter may be withdrawn as the tool is extracted.

My invention comprises various details of constructio-n and combinations and arrangements of parts which will be herein after fully described, shown in the accompanying drawings and then specifically defined in the appended claims.

I illustrate my invention in the accompanying drawings, in which Figure l is a central vertical sectional view through a tool embodying the features of my invention. Fig. 2 is a similar' view showing a slight lnodilication of the invention, and Fig. 3 is a detail View of one of the resilient pipe engaging members removed from the tool.

Reference now beingr had to the details of the drawings by letter, A. designates a tubular rod circumferentially threaded as at A and provided with a central duct or aperture B which, at its lower end, has branching passageways B through which water may be passed for the purpose of washing out any foreign matter which might interfere with the operation of the pipe-gripping device.

A guide shell, designated by letter D, which is cylindrical in outline, has its up per end contracted and interiorly threaded and adapted to engage the threads A.

y Said shell D is of greater diameter than the pipe A and a slight space, designated by letter E, intervenes between the circumference Iof the lower portion of the rod A and the inner wall of the member or shell D. The lowervend of said shell D is open and is beveled as at D and is adapted to guide the pointed end F into the broken pipe to be gripped by the tool and raised from the well hole. lower end solid below the branching passageways B and, at any suitable location in the circumference ofthe solid portion below said passageways, is formed a spiral groove H, the walls'of which are beveled at different inclinations. A pipe gripping member, designated by letter K, of spiral form and triangular in cross section as shown in the drawings and made of any suitablemetal, is seated in said spiral groove with a sharp edge K thereof projecting beyond the circumference of the rod in which it is seated, said sharp edge being adapted face of thc pipe and form a suitable grip` ping means to cause the pipe to be withdrawn with the tool.

In Fig. 2 of the drawings, I have shown a slight modification of my inventionin which the pipe gripping member, designated bv letter It, is seated in a spiral groove S which is formed in the inner c lr-v cumference of the guiding shell E and whlch modified form is adapted for use for engaging the circumference of the pipe rather than the inner surface, as shown in Fig. 1.

It will be noted upon reference to the drawings that the walls of the grooves near the upper ends thereof slightly converge, thereby forming a means whereby, when the rod is given a slight rotary movement after being in position to cause the spiral pipe-gripping member to engage the pipe, said member may be caused to expand slightly, thereby causing the sharp edge. of the member to engage and form a grippmg contact with the pipe.

What I claim to be new is 1. A device for removing pipes from wells, comprising a tool with a spiral groove formed therein, a resilient spiral pipe-giapping member seated in said groove and pro.- vided with a sharp edge adapted to bite Said rod A has its into the Wall of the tube to be Withdrawn from the Well, as set forth.

` 2. A device for extracting pipes from Wells consisting of a rod having a circumferential spiral groove formed therein, a resilient spiral pipe-gripping member with inclined edges seated in said groove and having a sharp edge projecting beyond the circumference of the grooved rod, as set forth.

3. A devi'e for extracting pipes from Wells consisting of 'a rod having a circumferential spiral groove formed therein, a resilientspiral pipe-gripping member with inclined edges seated in said groove and having a sharp edge projecting beyond the circumference of the grooved rod, and a guide member secured to and surrounding said rod, as set forth. A

4L. A device for extracting pipes from Wells consisting of a rod having a circumferential spiral groove formed thereini` a resilent spiral pipe-ripping member with inclined edges seated in said groove and having a sharp edge projecting beyond the circumference of the grooved rod, a guide member secured to and surroundin ysaid rod, said rod having a longitudinaly c annel, and exit ducts leading therefrom int'o the space intermediate the rod and said shell, as set forth. y v

5. A device lfor. removing pipes from Wells consisting of a rod having a` duct therein which leads through the circumference thereof and provided with a circunr ferential spiral groove With inclined Wall, the end of said rod being tapered, a resilient spiral pipe-gripping member, angular in cross section and seated in said groove having a sharp edge adapted to engage the Wall of a pipe, and means for guiding the rod, as set forth.

n testimony whereof l hereunto affix my signature in presence of two Witnesses..

LEWIS J QUIEN, MABEL C. JUDD. 

